Dynamic content for map icons

Allow directory admins to set dynamic content into map icons. Example is like Zillow maps where you can see prices of homes on the map. photo attached.

Also, I'm thinking of making it even more powerful and robust by allowing any custom field to be turned into a map icon. Basically any field a business fills out when adding their listing can be displayed as a map icon. Not just prices, but anything you want like star ratings, different categories, logo pic, latest review of a business, etc. lots of possibilities. Could be a really useful feature.